Cartridge connector: Difference between revisions

From SNESdev Wiki
Jump to navigationJump to search
(Adds a cartridge connector pinout page.)
 
(→‎Pinout: Added ASCII art)
 
(5 intermediate revisions by 2 users not shown)
Line 1: Line 1:
[[Category:Pinouts]]
==Pinout==
==Pinout==
This diagram represents a top-down view looking directly into the connector. Pins 01-31 are the bottom side of the connector and label side of the cartridge.
This diagram represents a view from the right side of the console, looking down into its connector. Pins 01-31 are closest to the front of the console and correspond to the front of the cartridge.


            SNES | Cart  |  SNES
    SNES (front) | Cart  |  SNES (back)
          (front)  -------  (back)
                  _______
     SYSTEM CLK <- |01  32| -> /WRAMSEL
                  |      |
         EXPAND <> |02  33| -> REFRESH
     SYSTEM CLK -> |01  32| <- /WRAMSEL
           PA6 <- |03  34| -> PA7
         EXPAND <> |02  33| <- REFRESH
        /PARD <- |04  35| -> /PAWR
           PA6 -> |03  34| <- PA7
          /PRD -> |04  35| <- /PWR
                  |_______|
                  |      |
           GND -- |05  36| -- GND
           GND -- |05  36| -- GND
          A11 <- |06  37| -> A12
      CPU A11 -> |06  37| <- CPU A12
          A10 <- |07  38| -> A13
      CPU A10 -> |07  38| <- CPU A13
            A9 <- |08  39| -> A14
        CPU A9 -> |08  39| <- CPU A14
            A8 <- |09  40| -> A15
        CPU A8 -> |09  40| <- CPU A15
            A7 <- |10  41| -> A16
        CPU A7 -> |10  41| <- CPU A16
            A6 <- |11  42| -> A17
        CPU A6 -> |11  42| <- CPU A17
            A5 <- |12  43| -> A18
        CPU A5 -> |12  43| <- CPU A18
            A4 <- |13  44| -> A19
        CPU A4 -> |13  44| <- CPU A19
            A3 <- |14  45| -> A20
        CPU A3 -> |14  45| <- CPU A20
            A2 <- |15  46| -> A21
        CPU A2 -> |15  46| <- CPU A21         Orientation:
            A1 <- |16  47| -> A22
        CPU A1 -> |16  47| <- CPU A22         -----------------------
            A0 <- |17  48| -> A23
        CPU A0 -> |17  48| <- CPU A23           _____________________
           /IRQ -> |18  49| -> /ROMSEL
           /IRQ <- |18  49| <- /ROMSEL         |              (----)|\
            D0 <> |19  50| <> D4
        CPU D0 <> |19  50| <> CPU D4           |                    | '
            D1 <> |20  51| <> D5
        CPU D1 <> |20  51| <> CPU D5           |                    | |
            D2 <> |21  52| <> D6
        CPU D2 <> |21  52| <> CPU D6           |_____________________| |
            D3 <> |22  53| <> D7
        CPU D3 <> |22  53| <> CPU D7           |  '              '  |\|
          /RD <- |23  54| -> /WR
      CPU /RD -> |23  54| <- CPU /WR         | 32_______________62 | |
     CIC data 1 <> |24  55| <> CIC data 2
     CIC data 1 <> |24  55| <> CIC data 2       |  |__|_________|__|  | |
  key CIC reset <- |25  56| <- CIC CLK
  key CIC reset -> |25  56| -> CIC CLK         |  1 ....          31 | |
         /reset <> |26  57| -> PHI2
         /RESET <> |26  57| <- PHI2             |_____________________| |
           +5V -- |27  58| -- +5V
           +5V -- |27  58| -- +5V             |  |_____|___|_____|  |\|
   
                  |_______|                    | :| --- |  | --^ |  | |
           PA0 <- |28  59| -> PA1
                  |      |                    |  |_____|  |_____| | |
           PA2 <- |29  60| -> PA3
           PA0 -> |28  59| <- PA1             |  |    | _ |    |  | |
           PA4 <- |30  61| -> PA5
           PA2 -> |29  60| <- PA3             |  |    |___|    |  | |
  left audio in -> |31  62| <- right audio in
           PA4 -> |30  61| <- PA5             |  |    |  |    |  | |
                  -------
  left audio in <- |31  62| -> right audio in   '--|_____|---|_____|--' |
                  |_______|                      \*_\_____\___\_____\__\|


==Signal descriptions==
==Signal descriptions==
* '''EXPAND''': Connects to expansion port pin 24 and is pulled high.
* '''EXPAND''': Connects to expansion port pin 24 and is pulled high.
* '''SYSTEM CLK''': 21.47727 MHz system clock.
* '''SYSTEM CLK''': 21.47727 MHz system clock.
* '''A23..0, /RD, /RW''': The CPU address bus, also known as the '''A bus'''.
* '''PHI2''': This is the CPU clock output. When this signal is high, this means only that the CPU bus address is in a stable state. For both reads and writes, data is only guaranteed or required to be valid at the falling edge of this signal. /RD, /WR, /PRD, and /PWR are normally used instead of this.
* '''A23..16''': Also known as bank address or '''BA7..0'''.
* '''CPU A23..0''': The CPU address bus, also known as the '''A bus'''.
** '''CPU A23..16''': Also known as bank address or '''BA7..0'''.
** '''CPU /RD, CPU /WR''': Read and write control lines for this bus.
* '''/ROMSEL''': Asserted when accessing ROM ($00-3F,80-BF:8000-FFFF, $40-7D,C0-FF:0000-FFFF). Also known as '''/CART'''.
* '''/ROMSEL''': Asserted when accessing ROM ($00-3F,80-BF:8000-FFFF, $40-7D,C0-FF:0000-FFFF). Also known as '''/CART'''.
* '''/WRAMSEL''': Asserted when accessing work RAM ($00-3F,80-BF:0000-1FFF, $7E-7F:0000-FFFF).
* '''/WRAMSEL''': Asserted when accessing work RAM ($00-3F,80-BF:0000-1FFF, $7E-7F:0000-FFFF).
* '''PA7..0, /PARD, /PAWR''': The peripheral address bus, also known as the '''B bus'''.
* '''PA7..0''': The peripheral address bus, also known as the '''B bus'''.
** '''/PRD, /PWR''': Read and write control lines for this bus.
* '''D7..0''': Data lines, shared between the CPU and peripheral buses.
* '''D7..0''': Data lines, shared between the CPU and peripheral buses.
* '''CIC CLK''': Either 4 MHz or 3.072 MHz, depending on the console.
* '''CIC CLK''': Either 4 MHz or 3.072 MHz, depending on the console.

Latest revision as of 01:49, 27 April 2022

Pinout

This diagram represents a view from the right side of the console, looking down into its connector. Pins 01-31 are closest to the front of the console and correspond to the front of the cartridge. 

    SNES (front) | Cart  |  SNES (back)
                  _______
                 |       |
   SYSTEM CLK -> |01   32| <- /WRAMSEL
       EXPAND <> |02   33| <- REFRESH
          PA6 -> |03   34| <- PA7
         /PRD -> |04   35| <- /PWR
                 |_______|
                 |       |
          GND -- |05   36| -- GND
      CPU A11 -> |06   37| <- CPU A12
      CPU A10 -> |07   38| <- CPU A13
       CPU A9 -> |08   39| <- CPU A14
       CPU A8 -> |09   40| <- CPU A15
       CPU A7 -> |10   41| <- CPU A16
       CPU A6 -> |11   42| <- CPU A17
       CPU A5 -> |12   43| <- CPU A18
       CPU A4 -> |13   44| <- CPU A19
       CPU A3 -> |14   45| <- CPU A20
       CPU A2 -> |15   46| <- CPU A21          Orientation:
       CPU A1 -> |16   47| <- CPU A22          -----------------------
       CPU A0 -> |17   48| <- CPU A23           _____________________
         /IRQ <- |18   49| <- /ROMSEL          |               (----)|\
       CPU D0 <> |19   50| <> CPU D4           |                     | '
       CPU D1 <> |20   51| <> CPU D5           |                     | |
       CPU D2 <> |21   52| <> CPU D6           |_____________________| |
       CPU D3 <> |22   53| <> CPU D7           |  '               '  |\|
      CPU /RD -> |23   54| <- CPU /WR          | 32_______________62 | |
   CIC data 1 <> |24   55| <> CIC data 2       |  |__|_________|__|  | |
key CIC reset -> |25   56| -> CIC CLK          |  1 ....          31 | |
       /RESET <> |26   57| <- PHI2             |_____________________| |
          +5V -- |27   58| -- +5V              |  |_____|___|_____|  |\|
                 |_______|                     | :| --- |   | --^ |  | |
                 |       |                     |  |_____|   |_____|  | |
          PA0 -> |28   59| <- PA1              |  |     | _ |     |  | |
          PA2 -> |29   60| <- PA3              |  |     |___|     |  | |
          PA4 -> |30   61| <- PA5              |  |     |   |     |  | |
left audio in <- |31   62| -> right audio in   '--|_____|---|_____|--' |
                 |_______|                      \*_\_____\___\_____\__\|

Signal descriptions

  • EXPAND: Connects to expansion port pin 24 and is pulled high.
  • SYSTEM CLK: 21.47727 MHz system clock.
  • PHI2: This is the CPU clock output. When this signal is high, this means only that the CPU bus address is in a stable state. For both reads and writes, data is only guaranteed or required to be valid at the falling edge of this signal. /RD, /WR, /PRD, and /PWR are normally used instead of this.
  • CPU A23..0: The CPU address bus, also known as the A bus.
    • CPU A23..16: Also known as bank address or BA7..0.
    • CPU /RD, CPU /WR: Read and write control lines for this bus.
  • /ROMSEL: Asserted when accessing ROM ($00-3F,80-BF:8000-FFFF, $40-7D,C0-FF:0000-FFFF). Also known as /CART.
  • /WRAMSEL: Asserted when accessing work RAM ($00-3F,80-BF:0000-1FFF, $7E-7F:0000-FFFF).
  • PA7..0: The peripheral address bus, also known as the B bus.
    • /PRD, /PWR: Read and write control lines for this bus.
  • D7..0: Data lines, shared between the CPU and peripheral buses.
  • CIC CLK: Either 4 MHz or 3.072 MHz, depending on the console.
Retrieved from "https://snes.nesdev.org/w/index.php?title=Cartridge_connector&oldid=34"